Honglian Li
State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, P. R. China; School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, P. R. China; School of Geosciences, University of Aberdeen, Scotland, AB24 3 UE, United Kingdom;

Xiang Jiang
School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, P. R. China;
China

Zijie Xu
State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, P. R. China; School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, P. R. China;
China

Stephen Bowden
School of Geosciences, University of Aberdeen, Scotland, AB24 3 UE, United Kingdom;
United Kingdom